package com.chenxi.vhr.config;

import org.springframework.security.access.AccessDecisionManager;
import org.springframework.security.access.AccessDeniedException;
import org.springframework.security.access.ConfigAttribute;
import org.springframework.security.authentication.AnonymousAuthenticationToken;
import org.springframework.security.authentication.InsufficientAuthenticationException;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.stereotype.Component;

import java.util.Collection;

/**
 * @author : zhangchenxi
 * @create : 2022-02-03
 **/
@Component
public class CustomDecisionManager implements AccessDecisionManager {

    @Override
    public void decide(Authentication authentication, Object object, Collection<ConfigAttribute> configAttributes)
            throws AccessDeniedException, InsufficientAuthenticationException {
        // configAttributes 当前请求访问需要的角色
        for(ConfigAttribute configAttribute: configAttributes) {
            String needRole = configAttribute.getAttribute();
            if ("ROLE_LOGIN".equals(needRole)) {
                if(authentication instanceof AnonymousAuthenticationToken) {
                    throw new AccessDeniedException("尚未登录，请登录！");
                } else {
                    return ;
                }
            }

            // 当前用户拥有的角色
            Collection<? extends GrantedAuthority> authorities = authentication.getAuthorities();
            for (GrantedAuthority authority : authorities) {
                if (authority.getAuthority().equals(needRole)) {
                    return ;
                }
            }
        }
        throw new AccessDeniedException("权限不足，请联系管理员！");
    }

    @Override
    public boolean supports(ConfigAttribute attribute) {
        return true;
    }

    @Override
    public boolean supports(Class<?> clazz) {
        return true;
    }
}
